I need to replace all 4 tires on my TT, a 28BH Grey Wolf. The current wheel size is 14". Would I be better to change over to 15" wheels and tires? I have found a couple places that offer tire and wheel combo's. I have got terrible life out of both sets of 14's that have been on the trailer so far. I will say the first set wore out due to bad axles, current axles not much better. I am trying to find a local place to align them before I replace the tires. I was just curious if the bigger wheel setup would be better in the long run, after the alignment of course.

Depends on weight. You need to weigh each axle and side to side to try and determine if any tire might be overloaded, or near capacity. Next you need to figure out exactly how large of diameter you can accomodate.

yes it does depend on the weight of your TT. I must say that forest river put two different sizes on my TT brand new. I had blow outs like you wouldn't believe. forest river would not stand behind their tires so I bit the bullet and went to the tire store and bought 15's and "E" rated tires, never had another blow out. if the tire well will hold a 15" go for it.

If you are a tempted to go with LT tires at some point, don't buy 15" rims. I have 15" rims and the only LT tire available is the Pirelli Scorpion for over $200 a tire (if you can even find them).

If you have bad axles then upgrading to the best tires won't help you. A big rig trailer repair shop can tell you if anything is wrong with your trailers axles. Then buy some quality tires such as; Depending on room in the wheel well and proper wheel pressure/wheel width requirements the Goodyear Wrangler HT in a LT235/75-15 C (50 psi) at 1980 lb capacity. Most LT tire makers carry this size.And a Wrangler HT in a LT215/75-15 D (65 psi) at 2090 lbs capacity. Maxxis LT U-168 are a commercial grade tire with several 15" sizes and have became popular with all types of trailer owners.Vanco 2 from Continental another popular tire for trailer users has several 15" sizes and load capacities.I see the Yokohama RY215 in a 700R 15 D at 2040 lbs capacity is popular on some of the other RV websites.Do your home work on the numbers.

Going to 15" is a good idea IF you have the space between the tires to accommodate the bigger diameter, so make sure you check to see if 15" Tires/Wheels will even fit. 15" gives you more options in load range, etc.

Change tire size? | Good Sam Community

donn0128
Explorer II
Jun 17, 2015
Depends on weight. You need to weigh each axle and side to side to try and determine if any tire might be overloaded, or near capacity. Next you need to figure out exactly how large of diameter you can accomodate.
old_guy
Explorer
Jun 17, 2015
yes it does depend on the weight of your TT. I must say that forest river put two different sizes on my TT brand new. I had blow outs like you wouldn't believe. forest river would not stand behind their tires so I bit the bullet and went to the tire store and bought 15's and "E" rated tires, never had another blow out. if the tire well will hold a 15" go for it.
ThomasFour
Explorer
Jun 17, 2015
If you are a tempted to go with LT tires at some point, don't buy 15" rims. I have 15" rims and the only LT tire available is the Pirelli Scorpion for over $200 a tire (if you can even find them).
JIMNLIN
Explorer III
Jun 17, 2015
If you have bad axles then upgrading to the best tires won't help you.
A big rig trailer repair shop can tell you if anything is wrong with your trailers axles.

Then buy some quality tires such as;

Depending on room in the wheel well and proper wheel pressure/wheel width requirements the Goodyear Wrangler HT in a LT235/75-15 C (50 psi) at 1980 lb capacity. Most LT tire makers carry this size.

And a Wrangler HT in a LT215/75-15 D (65 psi) at 2090 lbs capacity.

Maxxis LT U-168 are a commercial grade tire with several 15" sizes and have became popular with all types of trailer owners.

Vanco 2 from Continental another popular tire for trailer users has several 15" sizes and load capacities.

I see the Yokohama RY215 in a 700R 15 D at 2040 lbs capacity is popular on some of the other RV websites.

Do your home work on the numbers.
Ron3rd
Explorer III
Jun 17, 2015
Going to 15" is a good idea IF you have the space between the tires to accommodate the bigger diameter, so make sure you check to see if 15" Tires/Wheels will even fit. 15" gives you more options in load range, etc.
jwc99
Explorer
Jun 17, 2015
Thanks for the replies. I am in search of a shop to check my axles, there is not one local but I'm still looking. I think I have room for the 15's but if not what is a good tire in the 14" wheel?
time2roll
Nomad
Jun 17, 2015
Are you sure the wear is alignment issue vs. a tire issue?
Remove the worst tire and takes some pictures to post here.
jwc99
Explorer
Jun 17, 2015
The tires on the left side are wore solely on the insides, the right side tires are wore evenly on the inside and outside but the middle is barely wore. Looks like the sign of cheap tires. I'll try to get a picture in a couple days.
jwc99
Explorer
Jun 17, 2015
jwc99
Explorer
Jun 17, 2015
Sorry I took these with them still on the trailer, didn't have time today to take them off. The first 2 are on the left side.